exh23-1.htm

We consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-134316, 333-117489, 33-53589, 2-94436, 333-57608, 333-57575, 333-46901, 333-41363, 333-65265, 333-41904, 333-37308, 333-70560 and 33-63958) of our reports dated August 22, 2011, with respect to the consolidated financial statements and schedule of International Rectifier Corporation and Subsidiaries and the effectiveness of internal control over financial reporting of International Rectifier Corporation and Subsidiaries included in this Annual Report (Form 10-K) for the year ended June 26, 2011.